I get the feeling that what people are asking for as far as temporary jump gates is something that's doable in current aurora, and to a greater extent in C#. C# aurora will already have armorless space stations that have a variety of uses (refuleing, maintenance, etc), is anything stopping you from slapping a jump engine on that bad boy and calling it a jump gate? It will have to be able to jump to its position anyway.
I think there's room for both styles in Aurora. producing a stable jump point with a construction ship (with some text changes to better describe the concept of a stable jump point vs. the ambiguous jump gate that people seem to be picturing incorrectly) has use in that there's no maintenance involved, no size restrictions, etc.
If you can build a space station (and the corresponding jump engine required) using construction facilities, that also means you don't have to worry about having a huge shipyard to handle it, then tow it to its destination (like every other deep space station).
I don't know if its possible, but can you include both a military and commercial jump drive on a ship? If not, I think it should.
And if your opponent has a jump station on a point, why not send in Our Valiant Marine Corps to capture the facility and make use of it for our navy?
I just think people are latching onto the words "Jump Gate" too hard as a physical construct rather than metaphysical TN technobabble.
Correct me if I got any of that wrong, but I'm under the impression that this is all already possible.
Edit: If people are super set on the idea of destroying stable jump points, maybe it can be some kind of very late game, hyper expensive, one use "Space Time Destabilization Vortex Bomb," That basically is the equivalent of detonating a fusion bomb directly in the fluid dimension, with prohibitive costs and unintended consequences that make it a last resort option rather than as a standard practice when encountering alien Jump gates. Maybe the jump point closes for 5 years? Either way.